Hi
It is possible to load data back into the game but there are a few things to remember.
One is that you cant get new info once the game is running, it has to be loaded into a lua file before the game is started, there is no real-time access to the game.
Another one is that the data would have to be structured as lua array, to be imported into a lua file, accessible by whatever addon you choose/make to use the data.
Other than that its a great thing to get data back into the game. UniUploader allows you to specify one such destination file and gives you the option to update the game data before the launch of wow or after.
Obviously you'd choose - before the wow launch - to have the most recent data ingame.
I can tell you more about it if you're interested.
Also read this:
Advanced UU Techniques